(19)
(11) EP 3 797 205 A1

(12)

(43) Date of publication:
31.03.2021 Bulletin 2021/13

(21) Application number: 19806714.2

(22) Date of filing: 16.05.2019
(51) International Patent Classification (IPC): 
E21B 19/18(2006.01)
 E21B 1/00(2006.01)
(86) International application number:
PCT/SE2019/050443
(87) International publication number:
WO 2019/226096 (28.11.2019 Gazette 2019/48)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 21.05.2018 SE 1850598

(71) Applicant: Epiroc Rock Drills Aktiebolag
701 91 Örebro (SE)

(72) Inventor:
  • HELLMAN, Anders
    702 30 Örebro (SE)

   


(54) SYSTEM FOR DRILL BIT CHANGE IN A DRILLING RIG, DRILLING RIG COMPRISING SUCH A SYSTEM, AND A METHOD FOR CHANGING DRILL BITS USING SUCH A SYSTEM